My Little Pony is a toy and media franchise owned by the American company Hasbro, and they have long and windy ties to Filly ever since the latter's beginning.
Relations to Filly
Filly was created in 2006 and was initially competing against what is known as My Little Pony Generation 3. When My Little Pony G3.5 two or three years later proved unpopular with toy collectors, Filly kept growing in popularity, to the point that when the decently popular television show My Little Pony: Friendship is Magic reached German shores in the summer of 2011, the accompanying Generation 4 toys were heavily marginalised by Filly toys. This is known to annoy a lot of German bronies, as the Friendship is Magic fans are called.
A story about the origin of Filly tells that it was originally based on G3 brushable-toy molds during Hasbro's transition to G3.5, but this has largely been disproven as being mistaken for a series of other Simba horse brands, as well as it being disproven that Simba invented Filly.
Some of the My Little Pony characters' names are known to pretty close to Filly characters. The fourth generation of My Little Pony has Princess Luna, Princess Celestia, Rainbow Dash, Twilight Sparkle (who, in Friendship is Magic, has become a princess in Season 3 and the head of a school in Season 8) and Trixie. Meanwhile, Filly has Luna, Celestia, Rainbow, Dash, Twilight, Princess Sparkle and Trixie. Names like Luna, Twilight and Trixie are however common names in various forms of literature and product naming.
The English-language Filly Funtasia fandom as we know it began with 4chan /mlp/ threads from the 13th of October 2013 (where Filly websites and articles were discussed before the first trailer was revealed) and with the fan newssite Equestria Daily posting the October 2013 trailer of Filly Funtasia on the 16th of October 2013, from which news of the trailer quickly spread to many other My Little Pony fan sites. The general reaction was largely negative to the point where bronies to this day are still demeaning to it, including sending death threats to fan artists of Filly, and made BRB Internacional very cautious about Filly Funtasia on its YouTube account for more than half a year after it. But there are some that think this show has potential and viewing ability, a few of which in turn began organising on fansites and subcommunities.
Years later, Equestria Daily posted the Magical World trailer along with the Italian TV Spot for Filly Funtasia. This was followed by a post for The Cupcake Mystery a week later. No more Filly-related posts were made, for Filly isn't related to My Little Pony.
It has been stated by at least one BRB Internacional official that Filly Funtasia is not competing directly against Friendship is Magic, and that Filly Funtasia has several bronies in its production crew.